From b016e3fcd2efdb8c70d6ee8d53f63f729d5ba916 Mon Sep 17 00:00:00 2001
From: Justin Lecher <jlec@gentoo.org>
Date: Mon, 7 Dec 2015 13:31:32 +0100
Subject: virtualx.eclass: Add verbose warning about nonfatal call

Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=517976

Signed-off-by: Justin Lecher <jlec@gentoo.org>
---
 eclass/virtualx.eclass | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'eclass')

diff --git a/eclass/virtualx.eclass b/eclass/virtualx.eclass
index 8a6ee88a70b9..db1ecfa58b17 100644
--- a/eclass/virtualx.eclass
+++ b/eclass/virtualx.eclass
@@ -111,6 +111,16 @@ virtualmake() {
 # @DESCRIPTION:
 # Start new Xvfb session and run commands in it.
 #
+# IMPORTANT: The command is run nonfatal !!!
+#
+# This means we are checking for the return code and raise an exception if it
+# isn't 0. So you need to make sure that all commands return a proper
+# code and not just die. All eclass function used should support nonfatal
+# calls properly.
+#
+# The rational behind this is the tear down of the started Xfvb session. A
+# straight die would leave a running session behind.
+#
 # Example:
 #
 # @CODE
@@ -124,6 +134,17 @@ virtualmake() {
 # 	virtx py.test --verbose
 # }
 # @CODE
+#
+# @CODE
+# my_test() {
+#   some_command
+#   return $?
+# }
+#
+# src_test() {
+#   virtx my_test
+# }
+# @CODE
 virtx() {
 	debug-print-function ${FUNCNAME} "$@"
 
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